Image quality optimization of narrow detector dental computed tomography for paediatric patients

Danieli Moura Brasil; Ruben Pauwels; Wim Coucke; Francisco Haiter-Neto; Reinhilde Jacobs

doi:10.1259/dmfr.20190032

Image quality optimization of narrow detector dental computed tomography for paediatric patients

Danieli Moura Brasil^*, Ruben Pauwels, Wim Coucke, Francisco Haiter-Neto, Reinhilde Jacobs

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

11 Citations (Scopus)

Abstract

Objectives: Dental CBCT exposure parameters should be optimized according to patient-specific indications, mainly for children that are most vulnerable to harmful effects of ionizing radiation. The aim of this study was to determine optimized kV settings for paediatric acquisitions for a dental CBCT device. Methods: Clinical and quantitative evaluations of image quality were performed using 5 and 10 years old (y/o) anthropomorphic phantoms. Technical evaluation was performed with the SEDENTEXCT-IQ phantom. Images were obtained using a PaX-i3D Green CBCT (Vatech, Korea) device, combining tube voltages ranging from 85 to 110 kV and 2 fields of view (FOVs: 21 × 19 and 12 × 9 cm), while maintaining the radiation dose fixed by adjusting the mA accordingly. Clinically, observers assessed images based on overall quality, sharpness, contrast, artefacts, and noise. For quantitative evaluation, mean grey value shift, % increase standard deviation, % beam-hardening and contrast-to-noise ratio were calculated. For technical evaluation, segmentation accuracy, contrast-to-noise ratio and full width at half maximum were measured. Biplot graphs were used to choose representative parameters, from which the best kV was selected for each protocol and evaluation. kV values that had no statistical differences (p > 0.05) with the best kV chosen were considered as having the same quality. Results: Clinically, 95 kV was found as a cut-off value. From the quantitative aspect, 85 kV (p < 0.05) showed the worst quality, except in 12 × 9 cm 5 y/o. Technically, 85 and 110 kV in the large FOV showed significantly worse quality for the large FOV. conclusion: For paediatric indications, 95 kV or higher (and correspondingly low mA values) was found as optimal.

Original language	English
Article number	Y
Journal	Dentomaxillofacial Radiology
Volume	48
Issue	5
ISSN	0250-832X
DOIs	https://doi.org/10.1259/dmfr.20190032
Publication status	Published - 2019
Externally published	Yes

Keywords

Cone-beam computed tomography
Image Quality
Imaging
Optimization
Paediatric dentistry
Phantoms

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10.1259/dmfr.20190032

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title = "Image quality optimization of narrow detector dental computed tomography for paediatric patients",

abstract = "Objectives: Dental CBCT exposure parameters should be optimized according to patient-specific indications, mainly for children that are most vulnerable to harmful effects of ionizing radiation. The aim of this study was to determine optimized kV settings for paediatric acquisitions for a dental CBCT device. Methods: Clinical and quantitative evaluations of image quality were performed using 5 and 10 years old (y/o) anthropomorphic phantoms. Technical evaluation was performed with the SEDENTEXCT-IQ phantom. Images were obtained using a PaX-i3D Green CBCT (Vatech, Korea) device, combining tube voltages ranging from 85 to 110 kV and 2 fields of view (FOVs: 21 × 19 and 12 × 9 cm), while maintaining the radiation dose fixed by adjusting the mA accordingly. Clinically, observers assessed images based on overall quality, sharpness, contrast, artefacts, and noise. For quantitative evaluation, mean grey value shift, % increase standard deviation, % beam-hardening and contrast-to-noise ratio were calculated. For technical evaluation, segmentation accuracy, contrast-to-noise ratio and full width at half maximum were measured. Biplot graphs were used to choose representative parameters, from which the best kV was selected for each protocol and evaluation. kV values that had no statistical differences (p > 0.05) with the best kV chosen were considered as having the same quality. Results: Clinically, 95 kV was found as a cut-off value. From the quantitative aspect, 85 kV (p < 0.05) showed the worst quality, except in 12 × 9 cm 5 y/o. Technically, 85 and 110 kV in the large FOV showed significantly worse quality for the large FOV. conclusion: For paediatric indications, 95 kV or higher (and correspondingly low mA values) was found as optimal.",

keywords = "Cone-beam computed tomography, Image Quality, Imaging, Optimization, Paediatric dentistry, Phantoms",

author = "Brasil, {Danieli Moura} and Ruben Pauwels and Wim Coucke and Francisco Haiter-Neto and Reinhilde Jacobs",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors. Published by the British Institute of Radiology",

year = "2019",

doi = "10.1259/dmfr.20190032",

language = "English",

volume = "48",

journal = "Dentomaxillofacial Radiology",

issn = "0250-832X",

publisher = "Oxford University Press",

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T1 - Image quality optimization of narrow detector dental computed tomography for paediatric patients

AU - Brasil, Danieli Moura

AU - Pauwels, Ruben

AU - Coucke, Wim

AU - Haiter-Neto, Francisco

AU - Jacobs, Reinhilde

PY - 2019

Y1 - 2019

N2 - Objectives: Dental CBCT exposure parameters should be optimized according to patient-specific indications, mainly for children that are most vulnerable to harmful effects of ionizing radiation. The aim of this study was to determine optimized kV settings for paediatric acquisitions for a dental CBCT device. Methods: Clinical and quantitative evaluations of image quality were performed using 5 and 10 years old (y/o) anthropomorphic phantoms. Technical evaluation was performed with the SEDENTEXCT-IQ phantom. Images were obtained using a PaX-i3D Green CBCT (Vatech, Korea) device, combining tube voltages ranging from 85 to 110 kV and 2 fields of view (FOVs: 21 × 19 and 12 × 9 cm), while maintaining the radiation dose fixed by adjusting the mA accordingly. Clinically, observers assessed images based on overall quality, sharpness, contrast, artefacts, and noise. For quantitative evaluation, mean grey value shift, % increase standard deviation, % beam-hardening and contrast-to-noise ratio were calculated. For technical evaluation, segmentation accuracy, contrast-to-noise ratio and full width at half maximum were measured. Biplot graphs were used to choose representative parameters, from which the best kV was selected for each protocol and evaluation. kV values that had no statistical differences (p > 0.05) with the best kV chosen were considered as having the same quality. Results: Clinically, 95 kV was found as a cut-off value. From the quantitative aspect, 85 kV (p < 0.05) showed the worst quality, except in 12 × 9 cm 5 y/o. Technically, 85 and 110 kV in the large FOV showed significantly worse quality for the large FOV. conclusion: For paediatric indications, 95 kV or higher (and correspondingly low mA values) was found as optimal.

AB - Objectives: Dental CBCT exposure parameters should be optimized according to patient-specific indications, mainly for children that are most vulnerable to harmful effects of ionizing radiation. The aim of this study was to determine optimized kV settings for paediatric acquisitions for a dental CBCT device. Methods: Clinical and quantitative evaluations of image quality were performed using 5 and 10 years old (y/o) anthropomorphic phantoms. Technical evaluation was performed with the SEDENTEXCT-IQ phantom. Images were obtained using a PaX-i3D Green CBCT (Vatech, Korea) device, combining tube voltages ranging from 85 to 110 kV and 2 fields of view (FOVs: 21 × 19 and 12 × 9 cm), while maintaining the radiation dose fixed by adjusting the mA accordingly. Clinically, observers assessed images based on overall quality, sharpness, contrast, artefacts, and noise. For quantitative evaluation, mean grey value shift, % increase standard deviation, % beam-hardening and contrast-to-noise ratio were calculated. For technical evaluation, segmentation accuracy, contrast-to-noise ratio and full width at half maximum were measured. Biplot graphs were used to choose representative parameters, from which the best kV was selected for each protocol and evaluation. kV values that had no statistical differences (p > 0.05) with the best kV chosen were considered as having the same quality. Results: Clinically, 95 kV was found as a cut-off value. From the quantitative aspect, 85 kV (p < 0.05) showed the worst quality, except in 12 × 9 cm 5 y/o. Technically, 85 and 110 kV in the large FOV showed significantly worse quality for the large FOV. conclusion: For paediatric indications, 95 kV or higher (and correspondingly low mA values) was found as optimal.

KW - Cone-beam computed tomography

KW - Image Quality

KW - Imaging

KW - Optimization

KW - Paediatric dentistry

KW - Phantoms

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DO - 10.1259/dmfr.20190032

M3 - Journal article

C2 - 30864834

AN - SCOPUS:85068537627

SN - 0250-832X

VL - 48

JO - Dentomaxillofacial Radiology

JF - Dentomaxillofacial Radiology

IS - 5

M1 - Y

ER -

Image quality optimization of narrow detector dental computed tomography for paediatric patients

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Keywords

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